LEASES - Summary of Supplemental Balance Sheet Information (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Oct. 01, 2019
Operating Leases:
Operating right-of-use assets	$ 154,955	$ 163,552
Lease Liabilities:
Current portion of operating lease liabilities	29,018
Long-term operating lease liabilities	131,650
Total operating lease liabilities	160,668	$ 163,676
Finance Leases:
Property, plant and equipment, net	$ 13,318
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	us-gaap:PropertyPlantAndEquipmentNet
Lease Liabilities:
Lease liabilities, notes payable and current portion of long-term debt	$ 3,427
Lease liabilities, long-term debt, net	9,725
Total financing lease liabilities	$ 13,152
Finance Lease, Liability, Current, Statement of Financial Position [Extensible List]	us-gaap:LongTermDebtCurrent
Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]	us-gaap:LongTermDebtNoncurrent
Accumulated depreciation	$ 1,464